The increase was 15% sequentially or $10.4 billion in three months. That's the equivalent of an increase of $11 per share (to a current $81.2/share.)
Dediu notes that the amount is now nearly 16% higher than three months ago, and that the amount added last quarter is higher than the amount on hand 4.5 years ago, and that the cash added is higher than Google's overall revenues in the quarter.
The composition and growth of Apple's liquid assets is shown in chart below. You can learn more about Dediu's thoughts on this chart in his last Critical Path show.